/*
 * Copyright (c) 2017 Baidu, Inc. All Rights Reserve.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.trigram.uuid.bd.utils;

import java.text.ParseException;
import java.util.Calendar;
import java.util.Date;
import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * DateUtils provides date formatting, parsing
 *
 * @author yutianbao
 */
public abstract class DateUtils extends org.apache.commons.lang3.time.DateUtils {

  /**
   * Patterns
   */
  public static final String DAY_PATTERN = "yyyy-MM-dd";

  public static final String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";

  public static final String DATETIME_MS_PATTERN = "yyyy-MM-dd HH:mm:ss.SSS";

  public static final Date DEFAULT_DATE = DateUtils.parseByDayPattern("1970-01-01");

  /**
   * Parse date by 'yyyy-MM-dd' pattern
   */
  public static Date parseByDayPattern(String str) {

    return parseDate(str, DAY_PATTERN);
  }

  /**
   * Parse date by 'yyyy-MM-dd HH:mm:ss' pattern
   */
  public static Date parseByDateTimePattern(String str) {

    return parseDate(str, DATETIME_PATTERN);
  }

  /**
   * Parse date without Checked exception
   *
   * @throws RuntimeException
   *     when ParseException occurred
   */
  public static Date parseDate(String str, String pattern) {

    try {
      return parseDate(str, new String[]{pattern});
    } catch (ParseException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * Format date into string
   */
  public static String formatDate(Date date, String pattern) {

    return DateFormatUtils.format(date, pattern);
  }

  /**
   * Format date by 'yyyy-MM-dd' pattern
   */
  public static String formatByDayPattern(Date date) {

    if (date != null) {
      return DateFormatUtils.format(date, DAY_PATTERN);
    } else {
      return null;
    }
  }

  /**
   * Format date by 'yyyy-MM-dd HH:mm:ss' pattern
   */
  public static String formatByDateTimePattern(Date date) {

    return DateFormatUtils.format(date, DATETIME_PATTERN);
  }

  /**
   * Get current day using format date by 'yyyy-MM-dd HH:mm:ss' pattern
   *
   * @author yebo
   */
  public static String getCurrentDayByDayPattern() {

    Calendar cal = Calendar.getInstance();
    return formatByDayPattern(cal.getTime());
  }

}
